Title of Invention

A DEVICE FOR FIXING A DRIVE RING ON THE CASING OF A ROTARY TUBULAR KILN

Abstract The aim of the invention is fasten a riding ring of a rotary cylinder, particularly of a rotary kiln, whereby the riding ring (10), apart from the arresting thereof in an axial direction, can also be arrested in its peripheral direction with regard to the rotary cylinder casing (11) without the manufacturing of the riding ring requiring complicated machining processes such as shaving, shaping, the making of through holes, etc. To this end, the invention provides that the riding ring (10) is manufactured only in the form of a turned part, and clamping elements (15, 16) are placed around the riding ring periphery in a distributed manner. Said clamping elements engage in a non-positive manner with peripheral slots (19, 20) of the riding ring (10) and are actively connected to supporting elements that are fastened to the rotary cylinder casing (11).
Full Text

Fastening of a Riding Ring to the Casing of a Rotary Cylinder
DESCRIPTION
The invention relates to a fastening of a riding ring on the eating of a rotary cylinder, in particular a rotary furnace for the heat treatment of free-flowing materials, in particular bulk solids such as raw cement mix, whereby the riding ring, which encircles the rotary casing with clearance, is locked in the axial direction and in the circumferential direction relative to the rotary cylinder via support elements affixed to the casing of the rotary cylinder.
There are mainly two different fastening types used to fasten riding rings to the casing of a rotary cylinder e.g. of a rotary furnace:
1. The so-called loose riding ring fastening (floating tire), Known e.g. from DE-A-32 03 241. The riding ring is thereby not rigidly oonnected with the casing of the rotary cylinder but rather encircles the casing with radial play. On the riding ring station, the radial loads or forces from the furnace cylinder must be fed to the track rollers via the riding ring and to the baseplate via the bearing blocks. The rfding ring Is smooth on all sides and its axial movement is restricted by the retaining element fastened to the casing of the rotary cylinder. In the circumferential direction, the riding ring can move freely relative to the casing of the furnace and namely on washer plates, which are loosely inserted into the ring gap between the riding ring and the casing of the furnace, whereby any necessary correction* to the play of the riding ring can be made by switching out

the washer plates. Ovalteations and other deformations of the casing of ths rotary cylinder can be compensated for to a oertaln extent with this type of riding ring. However, the play of the riding ring and the relative movement of the riding ring must be constantly monitored using a measuring device for the safe and secure operation of this type of riding ring station.
2. The eo'called fixed riding ring fastening (fixed tire), known e.g. from DE-A-38 01 231 as well as EP-B-0 765 459. The interior surface of the riding ring fastening known from the first document is provided with cogs like an inner toothed rim, and the riding ring is supported in the axial direction as well as in the circumferential direction on retaining elements welded to the casing of the rotary cylinder via these cogs as well as wedges and washer plates. The riding ring fastening known from the second document has through holes distributed around the perimeter, through which through bolts can be fed, ths ends of which are affixed to retaining elements of the casing of the rotary cylinder so that, in this manner, the riding ring is fixed not only in ths axial direction but also in the circumferential direction. It is understood that both the planing and shaping of the internal teeth of a riding ring as well as the boring of holes In the riding ring are very costly production steps. Add to this the fact that material sectional weakenings are caused by both the inner teeth as well as by the through holes of the known riding rings, which is why these known riding rings must be constructed to be relatively thick-walled! which in turn leads to higher costs.
The object of the invention is to create a fastening for a riding ring of a rotary cylinder, in particular a rotary furnace, whereby the riding ring, irrespective of Its locking, can be immobilized in the axial direction as well as in its circumferential direction with respect to the casing of the rotary cylinder

without the riding ring requiring complex machining Ike planing, shaping, and the creation of through holes, etc.
This object is solved in accordance with the invention with a riding ring fastening with the characteristics of claim 1. Advantageous embodiments of the invention are specified in the subclaims.
In the riding ring fastening according to the invention, the riding ring itself is manufactured as a pure turning worfc piece, i.e. the cast or forged riding ring only needs to be processed on a carousel lathe machine, which needs to be used anyway to finish the riding ring to the desired external diameter and inner diameter. Further maohining like planing, shaping, boring, etc. is not required. With one and the same lathe machine, only circtf ar groove*, In which clamping elements distributed around the perimeter are force fit, which on the other hand are connected with support elements affixed to the casing of the rotary cylinder and which look the riding ring in both the axial direction and the circumferential direction, am turned into the riding ring, whereby, however, radial play is retained between the casing of the rotary cylinder and the interior surface of the riding ring and the inner surface of the riding ring for the incorporation of thermal expansions, deformations of the rotary cylinder, etc.
In accordance with another characteristic of the invention, the circular grooves of the riding ring are arranged on the interior surface of the riding ring and/or on at least one of the lateral surfaces of ths riding ring as annular tensioning grooves, and the clamping elements can be designed as screw Jaws, which engage with the tensioning groove on one hand and are fastened between the support elements of the casing of the rotary cylinder on the other hand and which each have a clamping screw. After the clamping screw is pulled, the screw jaw or the

clamping Element is force tit on the riding ring. The damping elements or the clamping jaws are freely accessible, so that a retensioning or switching cut of tha clamping jaws can take place at any time. The damping elements or the clamping jaw* can be standard parts, which also fit for rotary-cylinder riding rings of different diameters. As a rule, the riding ring supports the oaeing of the rotary cylinder centrically via Its clamping jaws, which are distributed around the perimeter and are force fit, whereby the riding ring no longer experiences relative movement with respect to the casing of the rotary cylinder, if necessary, e.g. in the case of non-round and/or arched rotary-cylinder casings, it is alao possible to support the bearing ring eccentrically on the casing of the notary cylinder via its clamping elements. In either case, play remains for the riding ring, which is fixed in the axial and circumferential directions, In the radial direction with respect to the rotary-cylinder casing. Thie play enables an unhindered expansion of the rotary-cylinder oaeing, e.g. during heating.
In accordance with another characteristic of the invention, the screw jaws of the clamping elements can be designed angularly, with an axial angular arm, the hook-shaped end of which engages with the circular groove arranged on the interior surface of the riding ring, while the radial angular arm supports the at least one clamping screw mentioned above, which engages with the circular groove arranged on the neighboring lateral surface of the riding ring and thus tensions the clamping element with the riding ring in a force-fitting manner
But, the screw jaws of the clamping elements can also be designed like grlppers or shears, whereby the jaws of the grippers or the ends of the shear* can be clamped in the circular grooves of the lateral surfaces of the riding rings.

The invention and its further characteristics and advantages are described in greater detail using the exemplary ombodimentB Illustrated schematically in the figures.
The figures show the following:
Fig. t: A cross section of a rotary-cylinder casing with clamping elements distributed
over the perimeter, which clamp a riding ring that is shown from the side on the rotary-cylinder casing,
Rg, 2: A partial longitudinal section through the rotary-cylinder casing with a tensioned
riding ring lorce-fit on it via clamping elements or sorew jaws,
Fig. 3; A partial top view of the riding ring fastening,
Fig. 4: As variants for Figure 3, a riding ring fastening, in which the screw jaws of the
clamping elements are designed like grippers on the right side of the riding ring and like shears on the left side of the riding ring,
Rg. 5: A partial top view of the riding ring fastening or the support elements fastened
on the rotary-cylinder casing, designed as spring guides,
Rg. 6: As variants for Figures 2 end 4, another type of riding ring fastening, and

Fig. 7: The lateral view of a riding ring with a circular groove, into which clamping
elements distributed over the perimeter with tapered foroe tranefer surfaces are inserted.
Rgure 1 shows a lateral view of riding ring 10, which is fastened on the casing 11 of a rotary cylinder, e.g. of a rotary furnace. The riding ring 10 encircles the rotary-cylinder casing 11 with radial play 12, and it is clamped in the axial direction and in the circumferential direction relative to the rotary cylinder via support elements 13,14, which are fastened on the rotary-cylinder cas'ng 1 1 by means of the clamping elements 15,16. eta described below. On the bottom side, the riding ring 10 is mounted on two track roller stations 17 and 18. Despite the immobilization of the riding ring 10, the radial play 12 allows an unhindered expansion of the rotary-cylinder casing 11 through heating, deformations, etc
The entire riding ring 10 is manufactured Inexpensively as a turning work piece on a carousel lathe machine, i.e. the riding ring has no bore holes, cogs, etc. Ae can be seen in Figure i, clamping elements 15,16, etc. are arranged around the perimeter of the riding ring 10; on one hand, they engage in a force-fit manner with the circular grooves (as can be seen in Figures 2 and 4 through 7) of the riding ring and on the other hand are connected with the support elements 13,14, etc. fastened to the rotary-cylinder casing 11 and they immobilize the riding ring in both the axial and circumferential directions.
As can be seen m Figure 2, annular tensioning grooves 19,20, with which screw jaws 21 of the clamping elements 15,16 engaget are turned into the interior surface of the riding ring 10 and/or into at least one lateral surface of the riding ring, whereby each of these sorew jaws are arranged between the support elements 13,14 fastened on the rotary-oylinder casing 11, as can also

be seen in Figures i and 3. The screw jaws 21 of the clamping elements distributed around the perimeter of the tiding ring 10 are designed angularly, and the axial angular arm with a hook-shaped end 22 or ends 22a and 22b in accordance with the exemplary embodiment in Figure 3 engages almoet swallow-tail-Ike with the circular groove 19 arranged on the interior surface of the riding ring, while the radial angular arm supports at (east one tensioning screw 23, which engages with the circular groove 20 arranged on the neighboring lateral side of the riding ring and which, after being pulled, tensions in a foroe-flt manner the screw jaws 21 of the clamping element with the riding ring 10. The damping screw 23 can still be secured by a screw 24 screwed into the radial angular arm of the screw Jaws.
As can be seen in the top view in Figure 3, the tensioning between the clamping element designed like screw jaws 21 and the rtdhg ring 10 can be advantageously designed as a symmetrical 3-point transfer of force with two spaced hooks 22a, 22b per angular screw jaw 21 arranged on the axial angular arm, which lie symmetrically opposite the clamping screw 23 arranged \n the radial angular arm of the screw jaws.
In accordance with the exemplary embodiment in the right half of Figure 4, the screw jaws of the clamping elements can be designed like grippera, the gripper jaws 25a, 25b of which engage with or clamp into two conoentrlc droular grooves 20a, 20b in the lateral surfaoes of the riding ring 1 o, if necessary with the help of undercuts. In accordance with the exemplary embodiment in the left half of Figure 4, the screw jaws of the damping elements can also be designed (ike shears, the shear ends 27a, 27b of which can be pivoted around the pivot pdnt 26 and partially spread through openings or spreading* into an appropriately shaped circular groove 20c on the lateral

surface of the riding ring 10. The clamping strength of the force-fit damped Joint is adjusted on the damping screw 23.
The top view In Figure S shows that the support elements 13,14 for immobilizing the r$jwrtrt§# ring 10 fastened on the rotary-cylinder casing 11 in the axial direction and in the circumferential direction can have spring guides 28,29 lying axtafly relative to XYm rotary cylinder, between each of which is arranged a clamping element 15,18, etc- tensioned in a force-fit manner on the riding ring 10. Theee spring guides 28,29 act like a spring and enable an even mors uniform transfer of force from the rotary-oyiinder casing 11 to the riding ring 10 via the clamping elements 15.15. etc. and from there to the baseplate via the track rollers 17,18.
The exemplary embodiment in Figure 6 differs from the exemplary embodiment in the right half of Figure 4 in that the gripping jaw* of the screw jaws of the clamping elements engage around the corner on the riding ring 10; i.e. the gripping Jews 25a engage with circular groove 19a arranged on the interior surface 01 the riding ring and the gripping jaws 25b engage with a circular groove 20b arranged on the lateral surface on the riding ring.
In aocordanoe with the exemplary embodiment in Figure 7, wedge-shaped elements 30a. 3Qb, which engage with clamping elements 31 provided with appropriate wedge surfaces, can be inserted into the radial groove 20d in the lateral surfaoe of ihd riding ring 10, whereby the clamped joint in this solution and thus the entire riding ring fastening are further reinforced as a result ol the rotary-cylinder casing 11 eat in motion In the direction of the arrow.

Fastening of a Riding to the Carried of a Rotary Cylinder
CLAJM$
i. Fattening of a riding ring (10) on the casing (11) of a rotary cylinder, in particular a rotary
furnace for the heat treatment of free-flowing materials, in particular bulk solids such as raw cement mix. whereby the riding ring (10), which encircles the rotary-oylinder casing (11) with clearance (12), is locked in the axial direction and in the oireumferentiai direction relative to the rotary cylinder (11) via support elements (13,14) affixed to the casing of the rotary cylinder. characterized in that distributed clamping elements (15,16) are arranged around the perimeter of the riding ring (10) only manufactured as a turning work piece, which on one hand engage in a force-fit manner with circular grooves of the riding ring and which on the other hand are conneoted with support elements (13,14) affixed to the caeing of the rotary cylinder (11) and which Immobilize the riding ring in both the axial and circumferential directions.
2. Riding ring fastening in accordance with claim 1,
characterteed in tfiaMho circular grooves of the riding ring (10) are arranged on the interior
surface Of trie riding ring and/or on at least one lateral surface of the riding ring as annular
tensioning grooves (19,20,20a through 20d), into which the screw jaws (21,25,27) of the
clamping elements (15,18) engage, which are affixed between the support elements {13,14) and
each of which have a clamping screw (23). after the pulling of which the screw jaw of the clamping element is tansioned in a force-ftt manner on the riding ring (10).

3. Riding ring fastening in accordance with claim 2,
Characterized irTthaft the screw jaws (21) of the clamping elements are designed angularly, with
an axial angular arm, the hook-shaped end (22 or 22a, 22b) of which engages with the circular
groove (19) arranged on the interior surface of the riding ring, while the radial angular arm
supports the at least one clamping screw (23), which engages with the circular groove [20)
arranged on the neighboring lateral surface of the riding ring and thus tensions the screw jaw (21} with the riding ring (10) in a force-fitting manner.
4. Biding ring fastening in accordance with claim 3,
charactariazd in the tensioning between the clamping element designed like eorew jaw (21) and the riding ring (10) Is designed as a symmetrical 3-point transfer of fores with two spaced hooks (22a, 22b) per angular screw jaw (21) arranged on the axial angular arm, which He symmetrically opposite the clamping screw (23) arranged in the radial angular arm of the screw jaw.
5- - Riding ring fastening In accordance with claim 2,
charaoterizad in thft the screw jaws of the damping elements are designed like gnppers, the gripping jaws (25a, 25b) of which engage in two concentric circular grooves (20a, 20b) of the lateral surface of the riding ring.
6. Riding ring fastening in accordance with claim 2,
charactered In that the screw jaws of the damping elements are designed like shears, the shear ends (27a, 27b) of which can be spread by opening or spreading apart the lateral surfaces of the riding ring into an appropriately shaped radial groove (20o).

7. Riding ring fastening in accordance with claim 1,
p hftracterttad in that the support elements (13,14) affixed to the rotary-cylinder casing (11) have spring gulcas (28,29) lying axial to the rotary cylinder, between each of which is arranged a clamping dement (15) tensioned in a force-fit manner on the begining (10).


Documents:

1114-chenp-2005 amended pages of specification 04-07-2011.pdf

1114-chenp-2005 amended pages of specification 30-03-2011.pdf

1114-chenp-2005 amended claims 04-07-2011.pdf

1114-chenp-2005 amended claims 30-03-2011.pdf

1114-chenp-2005 form-1 04-07-2011.pdf

1114-chenp-2005 other patent document 30-03-2011.pdf

1114-CHENP-2005 CORRESPONDENCE OTHERS 04-07-2011.pdf

1114-chenp-2005 form-3 30-03-2011.pdf

1114-CHENP-2005 POWER OF ATTORNEY 30-03-2011.pdf

1114-CHENP-2005 CORRESPONDENCE OTHERS 26-07-2010.pdf

1114-CHENP-2005 EXAMINATION REPORT REPLY RECIEVED 30-03-2011.pdf

1114-chenp-2005-abstract.pdf

1114-chenp-2005-claims.pdf

1114-chenp-2005-correspondnece-others.pdf

1114-chenp-2005-description(complete).pdf

1114-chenp-2005-drawings.pdf

1114-chenp-2005-form 1.pdf

1114-chenp-2005-form 3.pdf

1114-chenp-2005-form 5.pdf

1114-chenp-2005-form18.pdf

1114-chenp-2005-pct.pdf


Patent Number 248658
Indian Patent Application Number 1114/CHENP/2005
PG Journal Number 31/2011
Publication Date 05-Aug-2011
Grant Date 01-Aug-2011
Date of Filing 03-Jun-2005
Name of Patentee KHD HUMBOLDT WEDAG GMBH
Applicant Address DILLENBURGER STRASSE 69, D-51105 KOLN, GERMANY;
Inventors:
# Inventor's Name Inventor's Address
1 FILGES, RALF KIEBITZSTRASSE 8, 51427 BERGISCH GLADBACH, GERMANY;
2 KLOTMANN, FRED KAULCHENSWEG 32, 51105 KOLN, GERMANY;
PCT International Classification Number F16C 13/04
PCT International Application Number PCT/EP03/13269
PCT International Filing date 2003-11-26
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 102 56 758.1 2002-12-05 Germany